Theory:Electromagnetic Relay Usage:Auto Size:Miniature Protect Feature:Epoxy Contact Load:High Power Category:RF/IF and RFID Type:IC Description:ICs
A polarized relay refers to a relay that operates by the combined action of a polarized magnetic field and a magnetic field generated by a control current through a control coil. The polarized magnetic field is generally generated by magnetic steel or a DC-directed polarized coil; the direction of the armature of the relay depends on the direction of the current flowing in the control winding. It can be used as a circuit element in pulse generation, DC and AC conversion, summation, differentiation and signal amplification in automatic devices, remote control telemetry devices and communication equipment. It has the outstanding advantages of high sensitivity and fast action speed.
Polarization relay: a relay with a combined effect of a polarized magnetic field and a magnetic field generated by the control current through the control coil. Polarization relays are widely used in the aerospace field, and are one of the most basic components in automated electrical systems such as control systems, communication systems, and power systems. It has unique electrical and physical characteristics in the control circuit. It has the advantages of high conversion depth, large input-output ratio, strong anti-interference ability, multi-channel synchronous switching and other series of solid-state electronic components that cannot be replaced.
1. Change the starting position of the armature between the magnetic poles to adjust the operating current. The larger the gap, the larger the operating current. Otherwise, the operating current decreases.
2. Appropriately change the gap between the armature metal wing wing surface and the permanent plane to adjust the operating current.
3. Move the porcelain frame lightly left and right to change the action current of the relay. This method changes the action current greatly, so special care should be taken when adjusting.
4. Changing the position of the moving contact can adjust the magnitude of the return current, because the magnitude of the torsion force on the spring plate of the armature suspension after the relay action affects the change of the return current.
Polarization relays can be divided into two-position polarization relays, three-position polarization relays and two-position bias polarization relays according to different armature positions.
Two-position polarization relay: When the relay coil is energized, the armature is drawn to the left or right position according to the direction of the coil current. After the coil is de-energized, the armature does not return.
Three-position polarization relay: When the relay coil is energized, the armature is drawn to the left or right position according to the direction of the coil current; after the coil is de-energized, it always returns to the middle position.
Two-position biased polarization relay: when the relay coil is powered off, the armature is always on one side; when the coil is energized, the armature is attracted to the other side.